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2 years ago

During replication and transcription, the DNA unzips the

1 answer:

4 0

It has been a while since biology...but if there is one thing I definitely remember, it is the replication process of DNA.

Once the cell is ready to commence the process of replication, it begins by unzipping the double helix. This task is completed by an enzyme called the DNA Helicase. Then a DNA Polymerase takes half of the unzipped DNA strand and creates corresponding deoxyribonucleotides.

Hope I could help! Have a good one.

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plant roots grow in the direction of gravity. They are also exhibiting hydrotropism,which is a response to (A) water (B)gravity

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Answer:

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3 years ago

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A person measures his or her heart rate by counting the number of beats in 30s. If 40±1 beats are counted in 30.0±0.5s, what is

stepan [7]

Answer:

Heart rate=80 beats per minute

Uncertainty=3 beats per minute

Explanation:

We are given that a person measures heart beat by counting the number of beats in 30 s.

If number of beats= $40\pm 1$

Time= $30.0\pm 0.5$

We have to find the heart rate and its uncertainty in beats per minute

Maximum number of beats=40+1=41

Minimum time=30.0-0.5=29.5 s

Because when heart beat increases then time reduces.

We know that 1 minute =60 seconds

Therefore, time = $\frac{29.5}{60}=0.492 minutes$

Average number of beats=40

Average time=30 seconds= $\frac{30}{60}=0.5 minutes$

Heart rate = $\frac{number\;of\;beats}{time}$

Heart rate = $\frac{40}{0.5}=80 beats per minute$

Maximum heart rate= $\frac{41}{0.492}=83.33 beats per minute$

When minimum number of beats=40-1=39

Maximum time=30.0+0.5=30.5 seconds

Because when heart beat slow then it takes more times

Time= $\frac{30.5}{60}=0.508 minutes$

Minimum heart rate= $\frac{39}{0.508}=76.77 beats per minute$

Uncertainty when heart rate is maximum

Uncertainty=83.33-80=3.33 beats per minute

Uncertainty when heart rate is minimum

Uncertainty=80-76.77=3.23 beats per minute

Average uncertainty= $\frac{3.33+3.23}{2}$

Average uncertainty=3.28 $\approx 3$ beats per minute

Hence, heart rate=80 beats per minute

Uncertainty=3 beats per minute

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2 years ago

A mineral is described as "metallic." This description refers to its:

labwork [276]

Answer:

Hardness

Explanation:

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2 years ago

how certain structures affect the function of reduced collision impact? PLEASE ITS DUE IN 30 MINS I NEED AN ANSWER

scoundrel [369]

Answer:

When the size of a fixed mass of a solid reactant decreases, the rate of reaction increases.

This can be explained using the collision theory, as below:

When the size of a fixed mass of a solid reactant becomes smaller, the total surface area exposed to collision with the particles of the other reactants increases As a result, the frequency of collision among the reacting particles at the surface of the solid reactant increases. This causes the frequency of effective collision to increase. Hence, the rate of reaction increases.

Explanation:

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2 years ago

Which microscope is the most powerful and can map the atoms on the surface of an object?

muminat

Answer;

C. a scanning electron microscope

Explanation;

-Electron microscopy is a technique for obtaining high resolution images of biological and non-biological specimens. There are two main types of electron microscope; the transmission EM and the scanning EM.

-Scanning electron microscopes allow scientists to find the shape and surface texture of extremely small objects, including a paperclip, a bedbug, or even an atom.

-These microscopes slide a beam of electrons across the surface of a specimen, producing detailed maps of the surface of objects.

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2 years ago

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